<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="openRolesDialog">添加角色</el-button>
                    
                </el-col>
            </el-row>
            <!-- 角色列表区 -->
            <el-table :data='roleList' style="width:100%" border stripe>
                <!-- 展开列 -->
                <el-table-column type='expand'>
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for='(item1,i1) in scope.row.children' :key='item1.id'>
                            <!-- 渲染一级权限 -->
                            <el-col :span='5'>
                                <el-tag closable @close='removeRightById(scope.row,item1.id)'>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for='(item2,i2) in item1.children' :key='item2.id'>
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="(item3) in item2.children" :key='item3.id' closable @close='removeRightById(scope.row,item3.id)' type="warning">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type='index' label="#"></el-table-column>
                <el-table-column label='角色名称' prop="roleName"></el-table-column>
                <el-table-column label='角色描述' prop="roleDesc"></el-table-column>
                <el-table-column label='操作' width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size='mini' @click='openEditDialog(scope.row)'>编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size='mini' @click='openDeleteDialog(scope.row.id)'>删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size='mini' @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close='setRightDialogClosed'>
            <!-- 树形控件 -->
        <el-tree ref='treeRef' :data="rightList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys='defKeys'
        ></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
        </el-dialog>
        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRolesDialog" width="50%" >
            <el-form :model="roleForm" :rules="roleRules" ref="roleRef" label-width="100px">
                <el-form-item label="角色名称" prop="name">
                    <el-input v-model="roleForm.name"></el-input>
                </el-form-item>
                <el-form-item label="角色描述">
                    <el-input v-model="roleForm.description"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRolesDialog = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑角色的对话框 -->
        <el-dialog title="编辑角色" :visible.sync="editRoleDialog" width="50%" >
            <el-form :model="editRoleForm" :rules="editRoleRules" ref="editRoleRef" label-width="100px">
                <el-form-item label="角色名称" prop="name">
                    <el-input v-model="editRoleForm.name"></el-input>
                </el-form-item>
                <el-form-item label="角色描述">
                    <el-input v-model="editRoleForm.description"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialog = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return{
            // 所有角色列表数据
            roleList:[],
            //控制分配角色的对话框显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightList:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点Id值数组
            defKeys:[],
            //当前即将分配角色的id值
            roleId:'',
            //控制添加角色对话框的显示与隐藏
            addRolesDialog:false,
            // 添加角色对话框的数据
            roleForm:{
                name:'',
                description:''
            },
            // 添加角色对话框的验证规则
            roleRules:{
                name:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                ]
            },
            //控制编辑角色对话框的显示与隐藏
            editRoleDialog:false,
            editRoleForm:{
                id:'',
                name:'',
                description:''
            },
            editRoleRules:{
                name:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                ]
            }

        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
       async getRolesList(){
           const {data:res} = await this.$http.get('roles')
           if(res.meta.status!==200)return this.$message.error(res.meta.msg)
           this.roleList=res.data
        },
        //根据Id删除对应的权限
        removeRightById(role,rightId){
            // 弹框提示用户是否要删除
           this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).then(async () => {
                   const {data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                   if(res.meta.status!==200)return this.$message.error(res.meta.msg)
                    this.$message.success(res.meta.msg)
                    role.children=res.data
                }).catch(() => {
                    this.$message({
                        type: 'info',
                        message: '已取消删除'
                    });          
                });
        },
        // 展示分配权限的对话框
       async showSetRightDialog(role){
           this.roleId=role.id
            //获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status!==200)return this.$message.error(res.meta.msg)
            // 获取到的权限数据保存到data中
            this.rightList=res.data
            // console.log(this.rightList)
            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)

            this.setRightDialogVisible=true
        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys中
        getLeafKeys(node ,arr){
            // 如何当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>{
                this.getLeafKeys(item,arr)
            })
        },
        // 监听分配权限对话框的 关闭事件
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
       async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys)
            const idStr=keys.join(',')
           const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200)return this.$message.error(res.meta.msg)
            this.$message.success("分配权限成功！")
            this.getRolesList()
            this.setRightDialogVisible=false
        },
        // 点击按钮，打开添加角色的对话框
        openRolesDialog(){
            this.addRolesDialog=true
        },
        //发起post请求，添加角色
        async addRoles(){
            const {data:res} = await this.$http.post('roles',{roleName:this.roleForm.name,roleDesc:this.roleForm.description})
            // console.log(res)
            if(res.meta.status!==201)return this.$message.error('添加角色失败！')
            this.$message.success('添加角色成功！')
            // 添加角色成功后重新渲染列表
            this.getRolesList()
            this.addRolesDialog=false
        },
        // 点击按钮，打开编辑角色对话框
        openEditDialog(role){
            this.editRoleDialog=true
            // console.log(role)
            this.editRoleForm.id=role.id
            this.editRoleForm.name=role.roleName
            this.editRoleForm.description=role.roleDesc
        },
        //发起put请求，编辑角色
       async editRole(){
           const {data:res} = await this.$http.put(`roles/${this.editRoleForm.id}`,{roleName:this.editRoleForm.name,roleDesc:this.editRoleForm.description})
           if(res.meta.status!==200)return this.$message.error('编辑角色失败！')
            this.$message.success('编辑角色成功！')
            this.getRolesList()
            this.editRoleDialog=false
        },
        //打开删除角色的信息弹框
        openDeleteDialog(id){
            // console.log(id)
            this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).then(async () => {
                    const {data:res} =await this.$http.delete('roles/'+id)
                    if(res.meta.status!==200) return this.$message.error(res.meta.msg)
                     this.getRolesList()
                this.$message({
                    type: 'success',
                    message: '删除成功!'
                });
               
                }).catch(() => {
                this.$message({
                    type: 'info',
                    message: '已取消删除'
                });          
                });
        }
    }
}
</script>
<style lang="less" scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top:1px solid #eee;
    }
    .bdbottom{
        border-bottom:1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>